// Code derived from Stroustrup's PPP2 book
// § 4.4.2.3 for-statements
//  -and beginning on p 113

#include <iostream>

using std::cout;

// return the square of x
int square(int x) { return x * x; }

// calculate and print a table of squares of even numbers in the [0:100) range
int main()
{
  for (int i = 0; i < 100; i += 2)
    cout << i << '\t' << square(i) << '\n';
}